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00:00 Imagine a reality beyond our own. A realm where the laws of physics bend,

00:05 and the possibilities are even vaster than the cosmos itself.

00:08 Now imagine that you could not only go there, but that you could move through it with ease.

00:14 This is Unveiled, and today we're answering the extraordinary question;

00:17 is interdimensional travel possible?

00:19 Do you need the big questions answered? Are you constantly curious? Then why not subscribe to

00:25 Unveiled for more clips like this one? And ring the bell for more thought-provoking content!

00:30 Interdimensional travel is one of those unusual concepts that has seriously changed shape and

00:36 focus in recent times. Not so long ago, even mentioning it would have led others to thinking

00:42 that you were either a science fiction writer wholly wrapped up in your latest idea, or a

00:46 paranoid conspiracy theorist hell-bent on believing that nothing is real. Now, however, times have

00:52 changed, and interdimensional travel clearly isn't the kooky, out-there, really kinda questionable

00:58 prospect that it once was. Instead, it's a genuine source for scientific consideration.

01:04 Today we're setting out to unravel the enigma of interdimensional travel, what exactly it is,

01:09 and just how feasible it might be. We'll also be taking a closer look at proposed technologies

01:14 that might one day allow us to achieve it, and we're going to explore what our lives would be

01:19 like if it ever were possible. The enduring mystique of interdimensional travel is all to

01:24 do with what it fundamentally would offer to us; a way to break out of not only this world,

01:29 but this plane of existence. At its simplest, it refers to the hypothetical ability to move

01:34 between different dimensions, or realities, beyond our own. To slip into a total unknown.

01:40 And although we do usually understand "different dimensions" as being some kind of extension to

01:44 the three-spatial-plus-time that we already know and experience, in this context a dimension could

01:50 really be any independent realm with its own set of physical laws and properties. It's an idea that

01:56 certainly draws inspiration from some major theories in physics, such as string theory and

02:01 the various multiverse hypotheses, where it's proposed that our universe is just one of many.

02:07 But interdimensional travel is also hugely flexible. From some points of view, there aren't

02:12 actually a great many rules to abide by. Nevertheless, to travel to another dimension

02:17 would always imply somehow traversing the boundaries that separate these distinct realms.

02:22 And, in short, that would require an understanding and mastery of forces and energies that are beyond

02:28 our current comprehension. Even if we did stick to the most straightforward proposals for extra

02:33 spatial dimensions, knowing or even guessing at how we'd break into a 5D or 6D realm is something

02:39 that's currently beyond us. So, the fact is that, as of now, to interdimensionally travel

02:44 is to remain firmly within the territory of science fiction. At a point in time when we

02:50 still don't even understand the majority of the fabric of just our own standard universe,

02:54 with dark matter and energy being used to explain away our many, massive blind spots,

02:59 we just don't have the technological prowess needed to manipulate and navigate between dimensions.

03:05 But that's not to say that we never will. When debating the possibilities that might unfold,

03:10 there's really only one place to start. Wormholes. On one level, these are hypothetical

03:15 tunnels through spacetime that could connect distant points in the universe, allowing us to

03:20 instantly move to where would otherwise be lightyears away from us. And that's already

03:24 pretty far out and impressive. But on another, higher level, wormholes could offer even more.

03:30 They could potentially link us to different dimensions. Wormholes are essentially cosmic

03:36 shortcuts, allowing for faster-than-light travel and therefore dramatically reducing the time

03:41 needed for all physically imaginable journeys. There is one major hitch, though. While they're

03:46 theorised and do work as per our current scientific understanding, we haven't yet created or discovered

03:52 a wormhole in real life. So, that would need to happen first. And even then, there's certainly

03:57 no guarantee that wormhole travel would work quite as seamlessly as it always does in the movies.

04:02 To stabilise a wormhole and keep it open, we'd require exotic matter with negative energy density.

04:08 Known as "exotic" because it violates the energy conditions of classical physics,

04:13 it's also purely speculative at this point. And so, while again, the math behind wormholes is

04:19 theoretically sound, the practical challenges and the unknown properties of the matter needed

04:23 to make them work are why this still isn't an approach that we can in any way rely on.

04:28 Theoretical physicists continue to explore what's possible, but right now wormholes really are

04:34 story rather than fact. Nevertheless, all perhaps isn't lost. Inspired by the warp drives of

04:40 science fiction, the Alcubierre drive is another theoretical model that seemingly would allow us

04:45 to break into new dimensions - if they do exist. Only this time, it's a concept with just a little

04:50 more meat to the bone. An Alcubierre drive proposes the manipulation of spacetime to again reach

04:56 faster-than-light travel. Specifically, it involves contracting spacetime in front of a

05:02 spacecraft and expanding it behind, creating a warp bubble that then carries the vessel along,

05:08 locally free of physical constraints. Inside that warp bubble, you could basically do anything.

05:14 It's as though you'd be closed off from this reality, and no longer held back by the standard

05:18 laws of nature. Here, there have been genuine designs created as well, and even rumours of

05:23 a working prototype - although nothing has yet to be officially announced or demonstrated.

05:28 The main problem is that, once more, it's thought that it would demand enormous amounts of exotic

05:33 matter with negative energy density to warp spacetime via the Alcubierre method. All of

05:38 which means that it's also not currently conceivable - even if the idea is less vague than simply

05:44 wormholes. Finally, though, and if modern science has taught us anything, it's that the answers

05:50 might be found if you target the world of the very small. In this way, researchers have more

05:54 recently looked to quantum entanglement to bridge the gap. This is a phenomenon where

05:59 subatomic particles become interconnected, regardless of the distance between them.

06:04 In just this universe and dimension, they might exist millions of light-years away from each other,

06:09 but would still be inescapably bound. And it's this degree of unbreakable bond that has gotten

06:14 some thinking. Could entangled particles be used to create connections not just across super-long

06:20 distances, but between different dimensions? Here, it appears as though we wouldn't need the great

06:25 unknown of exotic matter to make it work. Although, to understand and control entanglement

06:30 on a large scale, we would need some major and yet unforeseen advancements in quantum technology.

06:36 In another recent video, we took a closer look at how quantum computing works, and it could be that

06:41 the machines and qubits of the future will eventually provide us with the power required…

06:46 although quite how is still seriously vague and entirely speculative. That said, quantum

06:52 entanglement is at least a real and observed phenomenon. We do have a physical base to work

06:57 from. If ever and however we do eventually achieve interdimensional travel, though, what would happen

07:03 next? That moment when humankind first makes any kind of link with another dimension would be a

07:08 monumental before and after point in history. For one, it would surely herald a new era of maybe

07:14 even unlimited exploration. It's a reasonable bet that progress would come slowly, and that we

07:19 wouldn't all be simply opening up portals and leaving this reality behind. Instead, it would

07:24 unfold in stages. But we may have even already seen the earliest stages, with multiple attempts

07:30 to genuinely teleport material at the quantum level - including, most notably, by the China

07:36 National Space Administration. So far, all of that has been happening just in our current dimension…

07:42 but if there are other, higher dimensions in which we could go, then some believe that our

07:47 latest experimentation should alert us to them. Clearly, interdimensional travel in real life

07:52 would demand massive developments in various fields, from energy production to materials

07:57 science. Harnessing that ever-elusive exotic matter, manipulating space-time, and controlling

08:02 quantum phenomenon would all push, even break, the boundaries of our current knowledge. But all of

08:08 that would be in search of answers to the most fundamental questions about the nature of existence…

08:13 like how and why are we here, and is there anywhere else that we could go? Unfortunately,

08:19 right now, the answer to today's question is quite simple. No, interdimensional travel,

08:25 beyond the dimensions we already exist in, isn't possible. But at the same time,

08:29 and for increasing numbers of theoretical scientists, that's a no that's just waiting

08:34 to be proven wrong. They imagine future wormholes, piloting tomorrow's ships fitted with Alcubierre

08:41 drives, and mastering the quantum realm so completely that we'll one day be able to

08:46 track and send individual particles en masse to another level entirely.

08:51 What do you think? Is there anything we missed? Let us know in the comments,

08:56 check out these other clips from Unveiled, and make sure you subscribe and ring the bell

09:00 for our latest content.

Is Interdimensional Travel Possible? | Unveiled

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